﻿//The MIT License(MIT)

//Copyright(c) 2015 Martin Chrzan

//Permission is hereby granted, free of charge, to any person obtaining a copy
//of this software and associated documentation files (the "Software"), to deal
//in the Software without restriction, including without limitation the rights
//to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
//copies of the Software, and to permit persons to whom the Software is
//furnished to do so, subject to the following conditions:

//The above copyright notice and this permission notice shall be included in
//all copies or substantial portions of the Software.

//THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
//LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
//OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
//THE SOFTWARE.
using System;
using System.Collections.Generic;

namespace XmlAutoComplete
{
    public enum Status { Start, End, SimpleClosed, Opened };

    /// <summary>
    /// Used inside XmsSuggestionEngine
    /// </summary>
    public class ElementInfo
    {
        public string Name { get; set; }
        public Status State { get; set; }

        public int Index { get; set; }
    }

    public class ElementComparer : IEqualityComparer<ElementInfo>
    {
        public bool Equals(ElementInfo x, ElementInfo y)
        {
            //Check whether the compared objects reference the same data.
            if (Object.ReferenceEquals(x, y)) return true;

            //Check whether any of the compared objects is null.
            if (Object.ReferenceEquals(x, null) || Object.ReferenceEquals(y, null))
                return false;

            //Check whether the products' properties are equal.
            return x.Index == y.Index;
        }

        public int GetHashCode(ElementInfo obj)
        {
            //Check whether the object is null
            if (Object.ReferenceEquals(obj, null)) return 0;

            //Get hash code for the Name field if it is not null.
            int hashProductName = obj.Name == null ? 0 : obj.Name.GetHashCode();

            int hashProductCode = obj.Index.GetHashCode();

            //Calculate the hash code for the product.
            return hashProductName ^ hashProductCode;
        }
    }
}
